Tool-post for lathes



(No Modelf) D. WILLIAMSON.

' l T001. POST POR LATHB'S. No..414,'788. Patented Nov, 12, 1889.

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nAvIo WILLIAMSON, OF BROOKLYN, NEW YORK- TooL-POST FOR LATHES.

SPECIFICATION forming part 0f Letters Patent NO. 414,788, dated November12, 1889.

' Application filed March 2, 1889. Serial No. 301,743. (No model.)

To @ZZ whom it' may concern.

15e it known that I, DAVID VILLIAMSON, a citizenof the United States ofAmerica, residing' at Brooklyn, in the county of Kings and State of NewYork, have invented and made certain Improvements in Tool-Posts forLathes and Similar Machines; and I do hereby declare that the followingis a full, clear, and exact description and specication of the same,reference being had to the drawings forming part thereof.

My invention relates to tool-posts for lathes, and particularly to themethod of and devices for tightening the cutting-tool in its supportingpost or standard, and also for fastening the standard or post in thelathe rest or carriage; and it consists in certain devices or elementsfully set forth in and claimed at the end of this schedule.

In order that persons skilled -in the art may understand, construct, anduse my invention, I will proceed to describe it by referring` to thedrawings, in which- Figure l represents a vertical side view of myinvention with the parts in position ready for use. Fig. 2 is a verticalcentral section of the same as it would appear were the front half ofFig. l removed. Fig. 3 is a vertical side View of the tool-tighteningsleeve and adjustingscrew, showing the slot for the cutting-tool. Fig.4. is a vertical side View of the main toolclalnping screw andtool-post. Fig. 5 is a vertical side view of the tool-post-clampingsleeve also. Fig. 6 is a horizontal cross-section on line .r of Fig. l.Figs. 3, 4, and 5 are views at right angles to Figs. l and 2, and showthe tool-slots in front View.

a represents the main tool-post, and l) the usual tool-clamping screw.-o is threaded at the portion o with male thread, and a is threaded athole p with female thread, Fig. 4.. d is provided with a groove s and aflange r at its lower end to bite and take into the usual T- groove in alathe-carriage. c represents a portion of the said lathe-carriage, intowhich the tool-post a takes.

n is the tool-slot through post a.

'L' is the cutting-tool held or clamped by screw b onto a gib h, placedunder the cutting-toolz' in slotn.

fis the tool-post-clamping sleeve. It surrounds and an internal flangerests upon the top of tool-post o. A central hole is bored through itfor the clamping-screw Z) to pass through. It is flanged outward atj,and it is free to Inove upon tool-post o. A tool-slot n is cut throughit to match with tool-slot n in tool-post a.

e is a tool-tightening sleeve, which surrounds the sleeve f. It has atool-slot n?, matching or coinciding with tool-slots n and n. It isflanged outwardly at its bottoni 7.', and' at its top it is tapped out,and the threaded tightening-plugd screws through it and bears upon thetop surface of sleeve f, between which surfaces a washer gis placed.Plug d is bored throughout its whole length, and tool-clamping screw opasses through it. Clamping-screw b has a nut-shaped head at Z, and plugd also is shaped'a't m to allow the use of a wrench upon it. The shellof tooltightening sleeve e is split near the bottom and flangedvertically, so that it can be tightened up to make it fit closely at alltimes to its place around the toolpost-clarnping sleeve f. The tool t'rests upon gib h, and gib-7L rests in tool-slot n2 in tightening-sleevee. Tighteningsleeve e rests upon the top of tool-post-clamping sleeve fthrough the Inediation of the adjusting or tightening screw d, andsleeve f rests upon the top of tool-post a. Therefore, since theclamping-screw b, when it is screwed downward through the top oftool-post a, bears upon the top surface of cutting-tool t', theclamping-sleeve f is forced downward, and the iiangej-is forced towardthe flange r, thus clamping 'them upon the metal c of thelathe-carriage, and thus the tool-post is held tightly. rlheadjusting-screw d in tightening-sleeve e, when it is screwed downwardupon the top of sleeve f, which rests upon post ct, forces. the sleevee, gib 7L, and cutting-tool t' upward and vbinds said tool tightlyagainst the end of. clamping.

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ting-tool in the tool-post without the use of shims or any temporarydevices, and it provides a convenient and simple method and device foraccomplishing a desirable result.

Then it is desired to raise the tool t' for adjustment to any requiredposition, screw b is loosened or screwed upward and screw d is screwed.downward, thus throwing the tool t' upward, tightening it, as before,against screw b. To lower it the reverse movements are employed.

Having now fully described my invention and the manner in which I haveembodied it, what I claim as new, and desire to secure by LettersPatent, is`

l. The annular toolsupporting sleeve e, having the tool-slots a2 eutthrough its sides, and provided with an adjusting-slot and screw at itsbase, and threaded through its upper internal flanged surface to receivean annular adjusting-screw d, substantially as and for the purpose setforth.

L. The tool-post j), the set-screw l), the annular ianged sleeve f, thetool-supporting sleeve e, and the annular adj listing-screw d, allcombined and arranged to operate substantially as set forth, to tightenthe toolpost in the lathe-carriage, to adjust the height of the tool inrelation thereto, and to bind the tool in a iixed position.

The combination, substantially as hereinbefore set forth, consisting' ofthe central main tool-post, the clamping-screw, the annular liangedtool-post-clamping sleeve, and the annular toolsupporting sleeveprovided with an annular adjusting-screw, all the said sleeves heiligprovided with tool-slots substantially coinciding with each other andwith the slot in the main post or standard, and supported upon andsurrounding said main standard, and arranged to operate substantially inthe manner and for the purposes hereinbefore set forth.

DAVID \\"ILLIAE\IS()N. W'lnesses:

W. L. lnNNnM, Jas. E. WARNER.

